A YouTube video helped me use a 19th-century book I’d bought on the history of extra-illustrated books (Tredwell’s A Monograph on Privately Illustrated Books: A Plea for Bibliomania, 1882) by teaching me to open the uncut pages w/an index card, NOT a knife. Who knew? https://youtu.be/VU7lqM6NfQo?si=GRDAgNKEkww6oXvv